/* CSS Variables */
:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-secondary: #64748b;
  --color-dark: #0f172a;
  --color-light: #f8fafc;
  --color-white: #ffffff;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-600: #475569;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius: 8px;
  --transition: all 0.3s ease;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-dark);
  background-color: var(--color-white);
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-dark);
  border: 2px solid var(--color-gray-300);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-menu a {
  font-weight: 500;
  color: var(--color-gray-600);
}

.nav-menu a:hover {
  color: var(--color-primary);
}

.nav-menu a.btn-primary {
  color: var(--color-white);
}

.nav-menu a.btn-primary:hover {
  color: var(--color-white);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--color-dark);
  transition: var(--transition);
}

/* Hero */
.hero {
  padding: 160px 0 100px;
  background: linear-gradient(135deg, var(--color-light) 0%, var(--color-white) 100%);
}

.hero-content {
  max-width: 800px;
  text-align: center;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 24px;
  color: var(--color-dark);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-gray-600);
  margin-bottom: 40px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* Features */
.features {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.section-header p {
  font-size: 1.125rem;
  color: var(--color-gray-600);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
}

.feature-card {
  padding: 32px;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.feature-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-light);
  border-radius: var(--radius);
  margin-bottom: 20px;
  color: var(--color-primary);
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--color-gray-600);
}

.feature-card.featured {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.03) 0%, var(--color-white) 100%);
}

.feature-card.featured .feature-icon {
  background: var(--color-primary);
  color: var(--color-white);
}

/* About */
.about {
  padding: 100px 0;
  background: var(--color-light);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-text h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.about-text p {
  color: var(--color-gray-600);
  margin-bottom: 24px;
}

.about-list {
  list-style: none;
}

.about-list li {
  padding: 8px 0;
  padding-left: 28px;
  position: relative;
  color: var(--color-gray-600);
}

.about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  background: var(--color-primary);
  border-radius: 50%;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.stat {
  text-align: center;
  padding: 32px;
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

.stat-label {
  color: var(--color-gray-600);
  font-size: 0.875rem;
}

/* Founder */
.founder {
  padding: 100px 0;
}

.founder-content {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  align-items: start;
}

.founder-image {
  position: sticky;
  top: 100px;
}

.founder-placeholder {
  width: 280px;
  height: 280px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  font-weight: 700;
  color: var(--color-white);
}

.founder-text h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.founder-title {
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 24px;
}

.founder-text p {
  color: var(--color-gray-600);
  margin-bottom: 16px;
  line-height: 1.8;
}

.founder-cta {
  margin-top: 24px;
  color: var(--color-dark) !important;
}

/* How It Works */
.how-it-works {
  padding: 100px 0;
  background: var(--color-light);
}

.steps-grid {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  position: relative;
}

.steps-grid::before {
  content: "";
  position: absolute;
  top: 32px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: var(--color-gray-200);
  z-index: 0;
}

.step {
  flex: 1;
  text-align: center;
  position: relative;
  z-index: 1;
}

.step-number {
  width: 64px;
  height: 64px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 20px;
}

.step h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.step p {
  color: var(--color-gray-600);
  font-size: 0.9375rem;
}

/* Contact */
.contact {
  padding: 100px 0;
}

.contact-content {
  max-width: 600px;
  margin: 0 auto;
}

.contact-form {
  background: var(--color-white);
  padding: 48px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--color-dark);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.contact-form .btn {
  width: 100%;
}

.contact-form .btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.form-success {
  text-align: center;
  padding: 48px;
}

.form-success h3 {
  font-size: 1.75rem;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.form-success p {
  color: var(--color-gray-600);
}

/* Footer */
.site-footer {
  background: var(--color-dark);
  color: var(--color-white);
  padding: 64px 0 24px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .logo-text {
  color: var(--color-white);
  margin-bottom: 16px;
  display: block;
}

.footer-brand p {
  color: var(--color-gray-300);
}

.footer-links h4,
.footer-contact h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-links ul li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--color-gray-300);
}

.footer-links a:hover {
  color: var(--color-white);
}

.footer-contact p {
  color: var(--color-gray-300);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.footer-bottom p {
  color: var(--color-gray-300);
  font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 968px) {
  .about-content {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .section-header h2 {
    font-size: 2rem;
  }

  .about-text h2 {
    font-size: 2rem;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }

  .founder-content {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
  }

  .founder-image {
    position: static;
  }

  .founder-placeholder {
    width: 180px;
    height: 180px;
    font-size: 3.5rem;
    margin: 0 auto;
  }

  .founder-text h2 {
    font-size: 2rem;
  }

  .founder-text p {
    text-align: left;
  }

  .steps-grid {
    flex-direction: column;
    gap: 32px;
  }

  .steps-grid::before {
    display: none;
  }

  .contact-form {
    padding: 32px 24px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
}